F. S. (Frederick Sadleir) Brereton

Born in 1872, Frederick Sadleir Brereton was a British Army medical officer who later reached the rank of lieutenant-colonel and was appointed CBE. He is best known as F. S. Brereton or Captain Brereton, the name under which many of his books were published.

His fiction was written mainly for younger readers and often followed the tradition of G. A. Henty: energetic historical adventures, wartime exploits, and stories set across the British Empire. He was a notably prolific writer, producing dozens of books, many of them centered on action, duty, and endurance.

Because he had active service experience as a soldier and physician, his stories often carry a strong sense of campaign life and military detail. Today he is remembered as a popular early 20th-century writer of boys' adventure fiction whose work captured the values and imagination of his era.